Alexander Zverev (pictured right) accused a fan of allegedly using a Hitler phrase during the match, before the chair umpire (pictured left) kicked the spectator out of the US Open. (Images: Channel Nine) Alexander Zverev has confronted a tennis spectator after alleging an 'unacceptable' Hitler phrase was used while in his round of 16 match against Jannik Sinner at the US Open. The German No.12 seed was in an epic battle with Italian Sinner in the fourth set with the match going well into the early hours of the morning. And just before his serve, Zverev stopped in shock before...